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felt garlands in any simple shape would make cool window decorations and brighten up a teen area, or a children's area but it could be made by teens as a volunteer project
-Fight camera condensation If you're taking your camera out into the cold, it can face serious condensation when you bring it back into a warm room. Remove the battery and memory card, and place the camera in a bowl of silica gel to suck up the moisture.
Learn how to turn your DSLR into a pinhole camera.